Sheet-metal can



(No Model.)

I. A. ASSMANN.

SHEET METAL CAN. No. 451,355. Patented Apr. 28, 18 91.

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FRANZ A. ASSMANN, OF EAST ORANGE, NEIV JERSEY.

SHEET-METAL CAN.

SPECIFICATION forming part of Letters Patent No. 451,355, dated April28, 1891.

Application filed February 5, 1891. Serial No. 380,311. (No model.)

To all whom it may concern.-

Be it known that I, FRANZ A. ASSMANN, of East Orange, in the countyof'Essex and St ate of New Jersey, have invented a new and usefulImprovement in Sheet-Metal Cans and otherVessels, of which the followingis aspecification, reference being had to the accompanying drawings.

This invention relates to cans and other Vessels of sheet metal ofpolygonal form.

I will first describe my improvement in detail with reference to thedrawings, and afterward point out its novelty in a claim.

Figure 1 represents a top View of acan embodying my invention, with thecover removed; Fig. 2, a vertical section in the line :0 5c of Fig. l ofthe complete can and cover; and Fig. 3 a vertical section in the line yy of Fig. l of the upper part of the can without the cover. Figs. 4 and5 are diagrams illustrating the method of making the body and part ofthe head of the can.

Similar letters of reference designate corresponding part-s in all thefigures.

In the example of my invention represented the polygonal side walls a ofthe can are made of a single plate of metal A, bent to form the cornersor angles Z9, and one end of the plate is lapped over the other end atone corner or angle, as shown at (Z in Fig. l, and soldered thereto tocomplete that corner or angle. The upper part of the plate is turnedinward at a right angle, as shown in Figs. 1 and 2, to form an integralinternal marginal flange c, which constitutes part of the head of thecan, to which the cover d, which completes the head, is to be secured bysoldering. The said flange is represented as having formed in it aslight depression or channel e, and the cover (see Fig. 2) as having itsedges 1' turned slightly downward to enter said channel, and therebyinsure the proper placing of the cover and facilitate the soldering. Thesaid flange c has provided in it corner-braces j, which at all thecorners except d, where the ends of the plate are joined, are seamlessand formed by gathering in the marginal portion of the plate of whichthe flanges c are formed. At the corner cl there must of course be ascam in the brace j.

I will now explain, with reference to Figs. 4: and 5, the method offorming the side a, flange c, and corner-braces j. Fig. 4 represents atop view of the plate A, having the upper margin turned in to form theflange 0,

but not yet bent to form the sides of the can. Fig. 5 represents aninner face view of the upper part of said plate corresponding with Fig.4. In order to facilitate the gathering in of those portions of theturned-in margin or flange c of the plate A which come opposite thecorners or angles 1), and which are to form the seamless corner-bracesj, I produce in the said portions, with a suitable tool, before bendingthe plate to form the polygonal body or side walls a, a series ofshallow angular depressions 7t, and then the act of bending the plate toform the said body or walls will gather or fold in the so depressedportions to form the said braces j. The gathers or folds thus producedmay be afterward squeezed fiat by means of a pair of pliers or otherinstrument. The channel e may be formed by a die after the plate A hasbeen bent to form the walls and flanges and the cover (1' soldered, andbefore the bottom Z of the can is put on. The bottom may be fitted andput on in any known or suitable manner. By this construction of the canI obtain a very stiff flange around the upper part of the can and verystrong upper corners compared with other cans having an upper internalflange integral with the sides and in which the necessary displacementof the metal at the corners of the flange has been effected by cuttingit out and removing it altogether, and, moreover,I am enabled to moreeasily and securely solder the corners.

WhatIclaim as my invention, and desire to secure by Letters Patent, is

A sheet-metal vessel having its walls of polygonal form and in which oneplate, constituting side walls, has its margin turned inward to form anintegral flange and gathered in at the angles between the side walls toform seamless corner-braces in said flange, sub stantially as herein setforth.

FRANZ A. ASSMANN.

Witnesses:

FREDK. HAYNES, L. M. EGBERT.

